S1E10
Dark Heart
Justice League Unlimited
calendar_todayDec 11, 2004
schedule23 min
star6.2
Most of the League battles with powerful alien nanotechnology but, realize that the waves of self-replicating robots cannot be simply destroyed. The diminutive Atom shrinks himself to stop the robots from the inside.
broadcast_on_home Networks
Cartoon Network
star Guest Stars
John C. McGinley
The Atom / Ray Palmer (voice)
Michael Beach
Commander (voice)
Cathy Cavadini
Katie (voice)
J.K. Simmons
Eiling (voice)